knock some skin
knock (one) some skin
obsolete To shake or slap hands with someone in a friendly manner. I went over and knocked Tommy some skin to let him know there were no hard feelings. Nice one—knock me some skin, baby!
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
knock someone some skin
Sl. to slap hands with someone, a sign of friendship. Hey, man, knock me some skin! Pete knocked Sam some skin, and they left the building together.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.