Jack was a little moppy to be driving.He's not mopped; he's sloshed.
moppy
1. slang Disheveled or untidy in appearance; tousled. Said especially of hair. You were cute when you were a kid. Look at that adorable moppy hair you had!
2. obsolete slang Drunk. We were a fair bit moppy coming out of the tavern.
mopped
and moppy
mod. alcohol intoxicated. Jack was a little moppy to be driving.