Rack

v.

Heard in Tipperary, Sligo and Dublin

To comb the hair; used in parts of West Tipperary in place of the standard verb.

In use

Would you rack your hair, tis standing on end.

Posh English

Kindly drag a toothed grooming implement through that thatch, sir, for it stands bolt upright like a startled hedgehog.

Same phrase, other counties