keel over

[keel over] {v.} 1. To turn upside down; tip over; overturn. -Usually refers to a boat.

The strong wind made the sailboat keelover and the passengers fell into the water.

2. {informal} To fallover in a faint; taint.

It was so hot during the assembly programthat two girls who were standing on the stage keeled over.

Whenthe principal told the girl her father died, she keeled right over.