Top Definition
Any portable Apple Macintosh computer with a clamshell form factor. Includes the (unsuccessful) Macintosh Portable, Macintosh PowerBook and iBook computers.
"My mum's Mactop is broken"

"What kind is it?"

"She has a G3 Powerbook, it's a Lombard"
by Shalroth May 13, 2005
5 Words related to mactop
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