Drop a Cog 

To shift down a gear to increase acceleration

"Drop a cog and floor it!"
out of a 30 zone into a 60

Drop a Cog by Dayfox April 30, 2009

Drop a cog 

The act of straining so hard you get a hernia in you ball sack and you look like one ball is bigger and lower than the other

Fuck me, you might drop a cog lifting that heavy arsed mofo

Drop a cog by Hairy wheelbarrow November 14, 2023