One who looks at your shoes while he's talking to you instead of his own.
Nobody will look for them.
Look ma, no hands!
They'll B flat
Current events
You take your shoes off before jumping on a trampoline.
A slipper. (Made this up today, but almost definitely will have been made up before by someone else)
He's the one staring at YOUR feet when he talks
Introverted Engineer looks at His shoes when he's talking to you. Extroverted Engineer looks at Your shoes when he's talking to you.