pro·pel·ler·head 
(prə-pĕlər-hĕd)
(prə-pĕlər-hĕd)n.
Slang
Slang
One who is highly skilled in a technical field, especially computer science, but who is often considered socially inept.
[From the small propeller on top of the beanie often worn by caricatures of scientifically knowledgeable persons in popular culture.]
- make-or-break
- make out
- make out like a bandit
- make over
- makeover
- make peace with
- maker
- make/raise a stink
- make-ready
- make ready
- make sail
- make scarce
- make sense
- makeshift
- make skin crawl
- make (someone's) acquaintance
- make someone's acquaintance
- make something of
- make sure
- make the best of
- make the dust fly
- make the grade
- make the most of
- make the rounds
- make the scene