
Perhaps Nixy calls it Timby's pet rhetorically. After all, Timby doesn't appear to care very much for it in the fifth panel.
But maybe it is Timby's pet, and he doesn't care much for it anyway. Or maybe he cares for it plenty but isn't worried about it, because it is famously resiliant to this sort of manhandlement.
Whatever the case, its presence in their house is distressing, and not to you and me alone - Nixy sure wants it disposed of. And Timby obliges.
"Timby, get your pet away from me! It's making a mess on the floor!"
"SLOOORGROOOWWWARGH!"
"Okay!"
WOOSH
"Not out the window! There a parking lot down there!"
"Oh well, not my problem anymore!"
SMASH HONK! HONK! HONK! HONK! ...
Comments
hahahahaha!!
Maybe pouring salt on it would kill it
Poor Nixy 
Fabulous artwork, Quartz. Some comics don't make sense at all in their format but you do really well at that ^__^
Praise the Lord! Hallelu!
I don't care what the devil's gonna do!
The Word and faith is my sword and shield
And Jesus is Lord of the way I feel!
Cool!
Thanks a lot!
“Timby, I know you’re awake! Don’t lie!” –Nixy, Contradictionary - Party
Nope
I don't think Timby cares for it very much. He didn't seem very troubled about flinging it out the window.
We should take our comfort from God's word, not from the circumstances of our lives.
What was that word that meant
What was that word that meant to throw something out the window?
I kinda wonder just what that slime thing would do to the cars
and just what Nixy will do when the "pet" is traced back to them and they're expected to pay for damages! 
I'd rather waltz than just walk through the forest- Owl City
*lolol*
Defenestrate.
*lolol* Timby has indeed defenestrated the pet.
“Timby, I know you’re awake! Don’t lie!” –Nixy, Contradictionary - Party
subject
Yes! That one! Thanks Quartz!
I'd rather waltz than just walk through the forest- Owl City
Irony
I just noticed the irony of this. In my windowsill at Alex's apartment, which overlooks a parking lot, is a framed 8”x10” of this comic.
“Timby, I know you’re awake! Don’t lie!” –Nixy, Contradictionary - Party
xD
Hahaha!!
Praise the Lord! Hallelu!
I don't care what the devil's gonna do!
The Word and faith is my sword and shield
And Jesus is Lord of the way I feel!