Green’s Dictionary of Slang

curl n.1

also curler

1. (US black) constr. with the, a Jheri curl [Jheri Redding, who in the 1970s invented this black hairstyle, in which the normal tight curls of black hair are replaced by straighter, softer curls, with a shiny wet look].

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[US]C. Major Juba to Jive 125: Curl n. (1980s–1990s) derogatory term, short for Jheri Curl.

2. a piece of excrement [resemblance].

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[UK]Roger’s Profanisaurus in Viz 87 Dec. n.p.: curl one off v. To carefully deliver a stool. – curler n. A lump of excrement so delivered. Also crimp off a length naval slang.
L. Purcell at mutantbanana.com 🌐 To have a brown baby (South Park) To have a curl.

SE in slang uses

In compounds

curl paper (n.) [SE, i.e. its shape; the link to sense 2 may be coincidental]

lavatory paper.

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[UK]Partridge DSUE (1984) 280/1: C.19–early 20.

In phrases

do twelve-ounce curls (v.) [play on weight-lifting jargon; the lifting of a 12oz beer can]

(US campus) to drink beer.

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[US]Eble Campus Sl. Apr. 3: do 12oz. curls – to drink beer.
[US]Stuck Mojo ‘Only the Strong Survive’ 🎵 But you’re still hesitant to fight for your rights. / Twelve-ounce curls, then you fuss and you gripe. / You say, ‘Why vote?’ / There’s no hope.
[US]C. Walden ‘Charlie Walden’s Tips for Missouri and Possum-Style Fiddlin’’ 🌐 Tip #2 Twelve Ounce Curls. Nothing strengthens your bowing arm like repeated 12 oz. curls. Just pick up your favorite brew and raise it to your lips. Repeat. Repeat. Repeat...