回答:
man topを-oの説明(ソート順)で実行すると、次の短い説明がリストされます。
cpu_me CPU time charged to me by other processes.
cpu_others
CPU time charged to other processes by me.
boosts The number of boosts held by the process. This is followed by the number of times the process has transitioned from unboosted to boosted in brackets. An asterisk before the value indicates that the process was able to send boosts at some point since the previous update. For more information about boosts, see xpc_transaction_begin(3).
(他の2つは一目瞭然ですが、ブーストは基本的にプロセスが呼び出しを行ってから一時的に実行優先度を上げ(ブースト)、一定時間後に通常に戻す(ブースト解除)ことを指します)