2
To contribute. Usually in reference to money, but can refer to anything (e.g. drugs).
1. "If we each chip in a tenner, we'll have enough money to rent a car!"

2. "If we each chip in a little bit of weed, we'll be able to roll a huge blunt."
by stoner_joesiph January 02, 2012
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3
Originating from Mario Golf, Chip-in! refers to when someone does something unexpectedly great.

Must be yelled with enthusiasm.
"Yo Tommy slept with that perfect 10 anna last night."
"Really? CHIP-IN!"
by Mikey Scheeeer March 15, 2010
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