Green’s Dictionary of Slang

gourd n.

[the hollow centre of the plant; note OF gourd, a swindle]

1. [mid-16C–18C] (UK Und.) a crooked die, which has been hollowed out to affect the throw.

2. [mid-19C; 1960s+] (esp. drugs) the head.

3. [1970s] (US campus) a stupid, empty-headed person.

In compounds

gourd-head (n.) [-head sfx (1)]

[mid-19C–1970s] (US) a blockhead, a fool; also as adj.; as phr. make gourds, make a fool of.

In phrases

blow one’s gourd (v.) (also flip one’s gourd, lose...) [blow v.2 (3c)/flip v.4 (2)]

[1960s+] (orig. US) to lose emotional control; to cause someone to do so.

out of one’s gourd (adj.) [backform. f. adv. below] [1960s+]

1. extremely affected by a given drug, usu. cannabis or a hallucinogen.

2. extremely drunk.

3. (also off one’s gourd) crazy, insane.

out of one’s gourd (adv.)

[1960s+] to an extreme degree, usu. of intoxication or craziness.

SE in slang uses

In phrases