pile up

pile up (http://definr.com/pile up)

     v 1: collect or gather; "Journals are accumulating in my office";
          "The work keeps piling up" [syn: accumulate, cumulate,
           conglomerate, gather, amass]
     2: arrange into piles or stacks; "She piled up her books in my
        living room" [syn: heap up, stack up]
     3: get together [syn: collect, accumulate, amass, compile,
         hoard]