Green’s Dictionary of Slang

trip v.1

[trip n.4 (1)]

1. with ref. to drugs.

(a) [1960s+] to be under the influence of a drug, to experience a drug’s effects, usu. hallucinogenic, orig. only of LSD; usu. as adj. tripping; thus tripping n. (1)

(b) [1960s+] (drugs) to take LSD.

(c) [1960s+] (drugs) to take any hallucinogenic drug.

2. in fig./ext. uses of sense 1.

(a) [1960s+] to play around, to ‘mess about’.

(b) [1960s+] to fantasize, to act in an irrational manner.

(c) [1960s+] to daydream.

(d) [1970s+] to be delighted, to be ecstatic; often as trip for, trip over; thus trip off (of)

(e) [1980s+] (US black) to lose control, to go mad, to overreact, to get angry.

(f) [1980s+] to be passionately interested or involved in; thus trip off

(g) [1960s+] (US black) to do something beyond the norm, in a positive way.

(h) [1990s+] to worry.

(i) [1990s+] to be surprised.

(j) [1990s+] to suffer.

In phrases

trip off (v.)

[1980s+] (US) to turn against, to become emotionally distanced.

trip off (of) (v.) [the image is of an experience so intense that it replicates the effects of LSD]

[1960s+] (orig. US) to enjoy.

trip out (v.)

see separate entry.

tripped-out (adj.)

see separate entry.

SE in slang uses

In phrases

trip down (v.) [SE trip, to walk lightly]

[1960s–80s] (US) to go to, to leave.

trip in (v.)

[1960s–80s] (US) to arrive, to enter.

tripped up (adj.) [var. on tripped-out adj. with the added image of falling over]

[1980s] (US campus) experiencing the effects of excessive drinking.

trip up on (v.)

[1980s] (US black) to betray a lover, to commit adultery.