manaboy100, you've been ninja'd by the ninjamaster. lulz.
I like Terro's wording better. "Gain -1/-1" sounds weird because the subject is the creature, not the stats. A creature can't really gain a number... I like to think of it as "This creature gains stats, specifically its stats are modified by +1/+1" or "This creature loses stats, specifically its stats are modified by -1/-1"