"Chalk It Down" is generally used by stoners in Ireland, it can mean various things, too many to even list but people use it as a substitute for "chill" or "ok" or "in your face"
Example 1:
Girlfriend: Are you messing around with Lisa???!!!
Boyfriend: Whoah Chalk it down! (chill)
Example 2:
Boy1:You coming to the party tonight?
Boy2:Ya, i'll be there @ 9, chalk it down! (ok)
Example 3:
Boy:I fucked your 'ol doll last night, ha chalk it down! (in your face)
Girlfriend: Are you messing around with Lisa???!!!
Boyfriend: Whoah Chalk it down! (chill)
Example 2:
Boy1:You coming to the party tonight?
Boy2:Ya, i'll be there @ 9, chalk it down! (ok)
Example 3:
Boy:I fucked your 'ol doll last night, ha chalk it down! (in your face)
by JaL December 30, 2004
Get the CHALK IT DOWNmug. by shox October 14, 2004
Get the chalk it downmug. Means 'to make a record of something' or 'to have completed something noteworthy'. Usually shortened to 'chalk it'.
by E/O/W September 3, 2005
Get the chalk it downmug.