From an O.Henry short story:
Love, when it is ours, is the other name for self-abnegation and sacrifice. When it belongs to people across the airshaft it means arrogance and self-conceit. The bride crossed her oxfords and looked thoughtfully at the distemper Cupids on the ceiling.

There is a technique of painting on plaster, using a mixture
of glue (sizing) and color called "tempera". But look at
all the defintions of "distemper" below!

Webster's 1913 Dictionary

Definition: \Dis*tem"per\, v. t. [imp. & p. p. {Distempered}; p.
pr. & vb. n. {Distempering}.] [OF. destemprer, destremper, to
distemper, F. d['e]tremper to soak, soften, slake (lime);
pref. des- (L. dis-) + OF. temprer, tremper, F. tremper, L.
temperare to mingle in due proportion. See {Temper}, and cf.
1. To temper or mix unduly; to make disproportionate; to
change the due proportions of. [Obs.]

When . . . the humors in his body ben distempered.

2. To derange the functions of, whether bodily, mental, or
spiritual; to disorder; to disease. --Shak.

The imagination, when completely distempered, is the
most incurable of all disordered faculties.

3. To deprive of temper or moderation; to disturb; to ruffle;
to make disaffected, ill-humored, or malignant.
``Distempered spirits.'' --Coleridge.

4. To intoxicate. [R.]

The courtiers reeling, And the duke himself, I dare
not say distempered, But kind, and in his tottering
chair carousing. --Massinger.

5. (Paint.) To mix (colors) in the way of distemper; as, to
distemper colors with size. [R.]

\Dis*tem"per\, n. [See {Distemper}, v. t., and cf.
1. An undue or unnatural temper, or disproportionate mixture
of parts. --Bacon.

Note: This meaning and most of the following are to be
referred to the Galenical doctrine of the four
``humors'' in man. See {Humor}. According to the old
physicians, these humors, when unduly tempered, produce
a disordered state of body and mind.

2. Severity of climate; extreme weather, whether hot or cold.

Those countries . . . under the tropic, were of a
distemper uninhabitable. --Sir W.

3. A morbid state of the animal system; indisposition;
malady; disorder; -- at present chiefly applied to
diseases of brutes; as, a distemper in dogs; the horse
distemper; the horn distemper in cattle.

They heighten distempers to diseases. --Suckling.

4. Morbid temper of the mind; undue predominance of a passion
or appetite; mental derangement; bad temper; ill humor.

Little faults proceeding on distemper. --Shak.

Some frenzy distemper had got into his head.

5. Political disorder; tumult. --Waller.

6. (Paint.)
(a) A preparation of opaque or body colors, in which the
pigments are tempered or diluted with weak glue or
size (cf. {Tempera}) instead of oil, usually for scene
painting, or for walls and ceilings of rooms.
(b) A painting done with this preparation.

Syn: Disease; disorder; sickness; illness; malady;
indisposition; ailment. See {Disease}.