Green’s Dictionary of Slang

1. (US) a $5 note.

1921		C.B. Booth ‘Mr Clacksworthy Within the Law’ Detective Story 13 Aug. 🌐 Every mornin when he starts in on the day’s business he moistens his fingers with glue t’ keep any Lincolns from slippin’ away from him.
1968		K. Brasselle Cannibals 201: The new kid had my coat in his hand [...] I whacked him with Mr. Lincoln and walked out.
1970		‘Red’ Rudensky Gonif 22: When we get out of this cold shack, we’ll make a pile of Lincolns.

2. (US black) a bag of drugs that has a penny in the middle so that it weighs more.

2000

Ebonics Primer at www.dolemite.com 🌐 lincoln Definition: when a dealer makes a dime bag weigh more by putting a penny in the middle. Example: That bitch be gettin a cap in his azz for sellin’ me a lincoln!