"screwing" in the noun sense
1. fuck, fucking, screw, screwing, ass, nooky, nookie, piece of ass, piece of tail, roll in the hay, shag, shtup
slang for sexual intercourse
"screwing" in the verb sense
1. sleep together, roll in the hay, love, make out, make love, sleep with, get laid, have sex, know, do it, be intimate, have intercourse, have it away, have it off, screw, fuck, jazz, eff, hump, lie with, bed, have a go at it, bang, get it on, bonk
have sexual intercourse with
"This student sleeps with everyone in her dorm"
"Adam knew Eve"
"Were you ever intimate with this man?"
2. screw
turn like a screw
3. screw, drive in
cause to penetrate, as with a circular motion
"drive in screws or bolts"
4. screw
tighten or fasten by means of screwing motions
"Screw the bottle cap on"
5. cheat, chouse, shaft, screw, chicane, jockey
defeat someone through trickery or deceit
Source: WordNet® (An amazing lexical database of English)
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