Yes, it is a form of the verb "to smash." It is the past tense of the verb, and also the past participle, which can also be used as an adjective (e.g. smashed glassware).
more smashed, most smashed
The kid smashed my car window with his bat.Superman smashed the car into the building.
Smashed was created in 2005.
The past tense of "smash" is "smashed."
On the morning of November first, there were many smashed pumpkins in the streets. Thatcar must have smashed into the bus at a very high rate of speed.
this means that they did awesome on something. they smashed the test.
Smashed Potatoes - book - was created in 1974.
Clubland Smashed was created on 2010-04-19.
I smashed a window - J'ai brisé une fenêtre.
Get Smashed Gate Crash was created on 2008-03-17.
Casually Smashed to Pieces was created on 2007-01-23.
Head-Smashed-In Buffalo Jump was created in 1955.