"A collection of insults 28" joke

Her learning curve is fractal.

Her lint trap is full.

Her lists are unlinked.

Her memory is truly random-access.

Her mental function can be graphed with a single dot.

Her mere presence causes parity errors, power fails, and head crashes.

Her mind is not grounded to a logic supply.

Her mind might have spontaneously combusted.

Her mind would be unstable even mounted on a tripod.

Her modem lights are on but there's no carrier.

Her objects are not fully oriented.

Her phone doesn't quite reach her desk.

Her random access is the same as her sequential access.

Her sewing machine's been out of thread for some time now.

Her ski lift doesn't go to the top of the hill.