"A collection of insults 45" joke

Low-bandwidth as an information source.
Lugnuts rattling in the hubcaps.
Made a career out of mid-life crisis.
Mainspring’s wound too tight.
Makes a black hole look bright.
Makes predictions that make weathermen/economists look good.
Memorized every Dr. Seuss story written.
Mental software is Version 1. 0 / still in beta test.
Mentally qualified for handicapped parking.
Metronome needs oil.
Might still be a virgin except for what nature did to her mind.
Mind like a steel sieve.
Mind like a steel trap - everything gets mangled / full of mice / nothing in, nothing out / rusted shut.
Missing a few buttons on his remote control.
Missing a few catalog cards / gears / marbles.