Sallow

sallow \SAL-oh\, adjective: having a sickly, yellowish color

She didn't look good, slouched down around the toilet bowl, waiting for the next wave of nausea to rise. She already felt it swelling in her body, and she rocked slightly back and forth, as if lost at sea, and she clung tightly to the cool porcelain, as if it were her life raft, which in a way it was, she thought, grinning weakly at her joke.
Suddenly imagining herself as actually being adrift in a gray vast ocean, the choppy waters in her stomach began to rise and she lifted herself above the rim, waiting, willing the muscles in her throat to begin their contracting. When she thought of how many people must have sat there, with bare, exploding buttocks, she finally vomited. Pink stuff. Chunky. Gross. But she was also grateful.
Having rode that one out, she slouched back against the cupboard below the sink, in a movement both clumsy and measured. Not for the first time that night, she asked herself why. Just then, laughter exploded from the kitchen, glasses clinked together and a clamorous chorus of "It's a Pirate's Life for Me" began. She wanted to be laughing too, but all that came out was a groan, as the sea in her stomach rose, determined to sink her ship. A bottle of rum. Yo-ho...