This is the 8397th most frequent Polish word.
plotkiem
"Plotkiem" means "through/over the fence" or can refer to "gossip" as an instrumental case of "plotka" depending on context.
Here, 'plotkach' (in a different case form 'plotkiem') means 'rumors'.
Szliśmy powoli, rozmawiając o różnych plotkach.
We walked slowly, discussing various rumors.
In this context, 'plotkiem' refers to a 'small fence', likely indicating size and possibly its insignificance.
Zgadłem, że najlepiej przejdziemy przez podwórko, pokonując plotkiem.
I guessed that the best way would be to cross the yard by stepping over the small fence.
Here, 'plotkiem' again refers to a 'small fence', emphasizing its physical properties.