Green’s Dictionary of Slang

freak v.¹

a euph. for fuck v. in various senses.

1958		H. Ellison Web of the City (1983) 79: Greek thumbed his nose at the ceiling. ‘Frayk ’em!’.
1985		Eble Campus Sl. Apr. 3: freak it – forget it, don’t let it bother you.
1991		in J. Breslin Damon Runyon (1992) 343: He had decided that he wanted to get out of town for good and settle in Hot Springs, Arkansas [...] So freak Carnera.
1998		Eble Campus Sl. Apr. 4: freak me – an epithet of self condemnation: ‘Freak me for missing my class.’.

In phrases

freak around (v.) [euph. fuck about v. (1)]

(US gay) to waste time; to window shop.

1972

B. Rodgers Queens’ Vernacular 85: freak around 1. to kill time, like strolling through the park; to just be your gay self 2. to window shop.