Your "helpful" friend who just finished his hour-long FL Studio course and isn't afraid to offer free amateur production advice!
"Have you considered adding OTT to the master? It would really improve the mix."
"Hey, quit being such a backseat producer!"
someone at a restaurant who is not paying but unsolicitedly tells the person paying how much to tip.
"Thanks for the meal and all, but really bro, you're leaving the waiter 10%?"
"Don't be such a backseat tipper man."
someone that shares links to articles/memes/other content without reading beyond the headline.
Person A: "Check out this article"
Person B after reading article: "wow, I can't believe they cover XYZ"
Person A: "Oh, I haven't actually read it yet but the title seemed interested"
Person B: "That is a peak backseat sharer approach"
An idle person who will gladly yell instructions to you while you are busy baking a cake. Not to be confounded with the backstreet baker who, in this case, would be cooking meth.
"Bitch can't you see I can bake my own motherfucking cake; don't be such a backseat baker!"
To hangout with a girl but then she brings her best friend along who then goes onto to lock you out of all conversations and if your in a car put you in the backseat.
When me and Kathryn picked up Alexis I realized I was about to be sent to the backseat.
The act of parenting when the children are not yours. Often happens in a very public place where peoples parenting skills are on display to random people.
Snikklefritz Larry, you're kicking sand all over me you little frolfer.
bystander 1 Geez that's some lousy parenting
bystander 2 Your backseat parenting is getting out of hand
Where both Dean Winchester and Sam Winchester were conceived. Also where Dean and Anna fucked.
Jared and Jensen referring to the impala backseat at a convention
Jared: How dare you
Jensen: If the '67 impala had never been created, then neither would Sam & Dean. Jensen laughing: That back seats got stories.
Jared(whispering): and strains