I just touched down, kick the motherfucking field goal

from Lil Wayne (Ft. Drake & Jadakiss) – It's Good Lyrics on Rap Genius

Meaning

“touchdown” meaning he’s now in the spot (back from jail) Or landing. In football When you score a touchdown you usually kick a field goal after wards.

This is one of the several Lil Wayne punchlines that make sense in passing, but under further analysis make little sense.
POINT AFTER TOUCHDOWN = 1 point (kicked after scoring 6 pts*)
FIELD GOAL = 3 points (kicked at any point during offensive possession)
He bent the rules of football to make his punchline work

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