Green’s Dictionary of Slang

beak n.2

also beaker
[SE beak of a bird]

1. [mid-19C+] the nose; thus beaked adj., describing the nose.

2. [mid-19C+] (also bake) the mouth, or face.

3. [late 19C–1900s] the penis.

4. [2000s] (drugs) cocaine [f. sense 1].

In derivatives

beaky (adj.)

1. [20C+] posessing a large nose.

2. [2000s] nosey, inquisitive.

In phrases

dip one’s beak (v.) (also dip one’s nose)

[early 19C+] to have a drink.

get one’s beak wet (v.)

[2000s+] (US und.) orig. US Mafia, to take a share of criminal profits, bribes, etc.

In exclamations

beak-o! [i.e. they are ‘nosey’]

[1980s+] (Aus. prison) an excl. used to upbraid one who is staring.

shut your beak!

[mid-19C; 20C+] shut up! be quiet!

SE in slang uses

In compounds

In phrases

strop one’s beak (v.) [SE strop, to sharpen]

[19C] of a man, to have sexual intercourse.