fontawesome/scss/_mixins.scssをいじった。AlfredのWork flowsのFontAwesomeと組み合わせると便利。

new_gist_file.scss

@mixin fonta($name) {
	&:before {
		font-family: FontAwesome;
		font-weight: normal;
		font-style: normal;
		display: inline-block;
		text-decoration: inherit;
		-webkit-font-smoothing: antialiased;
		*margin-right: .3em;
		@content;
	}
	@extend .#{$name};
}

.foo {
	@include fonta(icon-zoom-in);
}

.bar {
	@include fonta(icon-zoom-in){
		position: absolute;
		top:0;
		left:0;
		font-weight: bold;
	};
}