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Webster 1913 Edition

Verb.

[Cf.

Adj.

]

To be formal or affected in dress or manners; – often with up.

[Prov. Eng. & Scot.]

Halliwell.

Verb.

To be formal or affected. [Not English, or local.]

primp ‎(third-person singular simple present primps, present participle primping, simple past and past participle primped)

To spend time improving one's appearance (often in front of a mirror).
- 2001, Jo-Ann Mapson, "Bad Girl Creek"
  "Then I promise I'll let you take your bath and primp all day for your date."