Definition of "unsentimental"

But my favorite line of the sequence, and possibly the entire episode, is Homer asking his deeply irritated elderly neighbor, “Trying to run out the clock in Florida, eh?” That’s such a brutally funny, boldly unsentimental and coldly true bit of dialogue.

2012 May 27, Nathan Rabin, “TV: Review: THE SIMPSONS (CLASSIC): “New Kid On The Block” (season 4, episode 8; originally aired 11/12/1992)”, in The Onion AV Club‎