dork, v. — Green’s Dictionary of Slang

dork v.

(orig. US) of a man, to have sexual intercourse.

1972		B. Rodgers Queens’ Vernacular.
1989		P. Munro Sl. U.

ass-dork (v.)

(US) to sodomise, to have homosexual anal intercourse.

2003

(con. 1988) A. Swofford Jarhead 44: If you’re a puffer, we’ll catch you ass-dorking in the shower or we’ll find the cock magazine under your rack.