unload on (someone or something)
1. To remove (some load or cargo) from something and place it on something else. A noun or pronoun can be used between "unload" and "on" to specify what's being unloaded. The workers just unloaded the supplies right on the curb. Why didn't they at least carry them up to the door of the office? You'd have a much easier time if you unloaded those boxes on pallets for the forklifts to move. We won't be able to unload on the docks, so we'll have to find some place else.
2. To force someone or something to take or deal with some unwanted, burdensome, difficult, or stressful person or thing so that one no longer has to. No way! I don't mind looking after your kids for an afternoon, but there's no way you're unloading them on me for the entire weekend. The country has effectively been unloading its financial problems on its neighbors for the last two years. I tried unloading a lot of this useless old junk on my friends and family, but there was still a ton of stuff I had to throw away.
3. To share one's intimate emotions, thoughts, or secrets with someone else, especially that which is troubling, stressful, or distressing. I had simply asked him how things had been, when suddenly he unloaded on me about all the problems he's been dealing with at work. I'm sorry for unloading on you like that. I just haven't had anyone to talk to since the divorce.
4. To criticize or scold someone very harshly or severely. The boss came in and unloaded on all of us for the project's failure. I don't know why you're unloading on me—I didn't do anything wrong!
unload someone or something on (to) someone
to get rid of a burdensome person or thing on someone else. I unloaded my obnoxious little cousin onto his aunt. I didn't mean to unload my problems onto you.